Normal Distribution

On average, your department ships an order two hours after it is received. The distribution of times is approximately normal, the standard deviation is 15 mins. -today you handled 120 orders (empirical rule)a. how many orders would you expect to be shipped :
within 2 hours of being received --b. within 1 hour 30 mins

How many orders would you expect to NOT BE shipped after 2 hrs 30 mins.